diff --git a/java/openapi/src/com/intellij/openapi/roots/libraries/JarVersionDetectionUtil.java b/java/openapi/src/com/intellij/openapi/roots/libraries/JarVersionDetectionUtil.java
index 04c21395d4df..3f8bca796962 100644
--- a/java/openapi/src/com/intellij/openapi/roots/libraries/JarVersionDetectionUtil.java
+++ b/java/openapi/src/com/intellij/openapi/roots/libraries/JarVersionDetectionUtil.java
@@ -79,11 +79,13 @@ public class JarVersionDetectionUtil {
     }
   }
 
-  public static String getBundleVersion(@NotNull File jar) throws IOException {
+  @Nullable
+  public static String getBundleVersion(@NotNull File jar) {
     return JarUtil.getJarAttribute(jar, new Attributes.Name("Bundle-Version"));
   }
 
-  public static String getImplementationVersion(@NotNull File jar) throws IOException {
+  @Nullable
+  public static String getImplementationVersion(@NotNull File jar) {
     return JarUtil.getJarAttribute(jar, Attributes.Name.IMPLEMENTATION_VERSION);
   }